Fig 1. Examples of swaps, dotted line marks the diagonal. Vertical axis shows towers pointed by TPC MIP track. X-axis shows BPRS soft ID if given ADC was in the range [7,30] - the expected MIP response. Every BPRS tile was examined for every track, multiple times per event if more than 1 MIP track was found.

Left: 4 sets of 4 strips needs to be rotated. Right: shift by 1 of 80 strips overlaps with rotation of 6 strips.

Below I listed BPRS tiles which look suspicious. However it is not a detailed study, there is more problems in the histos I have accumulated.

BPRS status tables need more work, in particular channels with close to 100% cross talk can't be found using single spectra, because they will fine (just belong to another channel)

Identified BPRS hardware problems:
Tiles w/ ADC=0 for all events:
* 3301-4, 3322-4 - all belong to PMB44-pmt1, dead Fee in 2007
belonging to the same pmt:
3321 has pedestal only
3305-8 and 33205-8 have nice MIP peaks, work well
* 2821, 3781 , both at the end of 80-chanel shift in mapping
neighbours of 2821: 2822,... have nice MIP
similar for neighbours of 3781
* 4525, 4526 FOUND! should be readout from cr=2 position 487 & 507, respectively
I suspect all those case we are reading wrong 'positon' from the DAQ file
Pair of consecutive tiles with close 100% cross talk, see Fig 4.
35+6, 555+6, 655+6, 759+60, 1131+2, 1375+6, 1557+8,
2063+4, 2163+4, 2749+50, 3657+8,
3739 & 3740 copy value of 3738 - similar case but with 3 channels.
4174+5
Hot pixels, fire at random
1514, 1533, 1557,
block: 3621-32, 3635,3641-52 have broken fee, possible mapping problem
block: 3941-3976 have broken fee
Almost copy-cat total 21 strips in sections of 12+8+1
3021..32, 3041..48, 3052
All have very bread pedestal. 3052 may show MIP peak if its gain is low.